Cow oak, also known as turkey oak or Durmast oak, is a species of oak found in Europe, Asia, and North America. The word "cow" in its name might have originated from its large size, which allows cattle to graze under its shade. However, there are various synonyms for cow oak, including Quercus cerris, Quercus petraea, Quercus pubescens, and Quercus robur. These synonyms refer to the different subspecies and varieties of oak that share similar characteristics with cow oak, such as thick bark, broad leaves, and the ability to thrive in a wide range of soil types. Despite their differences, all of these oak species are highly valued for their wood, which is often used for furniture, flooring, and construction.